EP0282286A2
Expired / Lapsed
EP
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Superconducting wire and method of manufacturing the same
Assignee: Toshiba Corp
•
Filing: 1988-03-09
•
Granted: —
•
Expires: 2008-03-09
Abstract
Abstract A starting material which is converted to a continuous body of an oxide superconductor by a heat treatment is filled in a tubular Ag sheath member (2). The diameter of the filled member is reduced by extrusion to form a wire. The wire is subjected to a heat treatment so that the starting material inside the sheath member is converted to a continuous body of an oxide superconductor (1). A superconducting wire constituted by the sheath member (2) and the oxide superconductor (1) filled inside the sheath member is obtained. A superconducting coil can be obtained by winding the superconducting wire.
Inventors
- 👤 Yutaka C/O Patent Division Yamada
- 👤 Satoru C/O Patent Division Murase
- 👤 Hisashi C/O Patent Division Yoshino
- 👤 Noburu C/O Patent Division Fukushima
- 👤 Hiromi C/O Patent Division Niu
- 👤 Shigeo C/O Patent Division Nakayama
- 👤 Misao C/O Patent Division Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; H10N60/20; H10N60/203; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/725; Y10S505/739; Y10S505/74; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929
Claims Analysis
Total Claims: 109
Claim 1
Independent Claim
19 words
A superconducting wire comprising: a tubular sheath member (2); and an oxide superconductor (1) filled in said sheath member.
Claim 2
Dependent Claim
19 words
A superconducting wire comprising: a tubular sheath member (2); and an oxide superconductor (1) filled in said sheath member.
Claim 3
Dependent Claim
20 words
A superconducting wire according to claim 1, characterized in that said oxide superconductor (1) has a perovskite type crystal structure.
Claim 4
Dependent Claim
43 words
A superconducting wire according to claim 2, characterized in that said oxide superconductor (1) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 5
Dependent Claim
49 words
A superconducting wire according to claim 3, characterized in that said oxide superconductor (1) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 6
Dependent Claim
48 words
A superconducting wire according to claim 3, characterized in that said oxide superconductor (1) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 7
Dependent Claim
30 words
A superconducting wire according to claim 1, characterized in that said sheath member (2) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, and their alloys.
Claim 8
Dependent Claim
29 words
A superconducting wire according to claim 1, characterized in that said sheath member (2) contains a material selected from the group consisting of: Cu, Nb, Fe, and their alloys.
Claim 9
Dependent Claim
28 words
A superconducting wire according to claim 1, characterized in that said sheath member (5) has a double-layered structure comprising an inner layer (3) and an outer layer (4).
Claim 10
Dependent Claim
40 words
A superconducting wire according to claim 8, characterized in that said outer layer (4) contains Cu or a Cu alloy, and said inner layer (3) contains a material selected from the group consisting of: Ag, Au, Pt, and their alloys.
Claim 11
Dependent Claim
31 words
A superconducting wire according to claim 2, characterized in that C planes (14) of crystal grains (13) of said oxide superconductor (11) are oriented along a longitudinal direction of said wire.
Claim 12
Dependent Claim
52 words
A superconducting wire according to claim 10, characterized in that said wire is of a flat shape and has a pair of flat surfaces (25, 26), and the C planes (24) of the crystal grains (23) of said oxide superconductor (21) are oriented to be parallel to the flat surfaces (25, 26).
Claim 13
Dependent Claim
24 words
A superconducting wire according to claim 10, characterized in that a crystal orientation rate of the crystal grains (13) is not less than 70%.
Claim 14
Dependent Claim
24 words
A superconducting wire according to claim 11, characterized in that a crystal orientation rate of the crystal grains (23) is not less than 70%.
Claim 15
Dependent Claim
26 words
A superconducting wire according to claim 11, characterized in that a ratio of a width to a thickness of said wire is not less than 2.
Claim 16
Dependent Claim
28 words
A superconducting wire according to claim 1, characterized in that a core member (6) is buried in said oxide superconductor (1) along a longitudinal direction of the wire.
Claim 17
Dependent Claim
32 words
A superconducting wire according to claim 15, characterized in that said core member (6) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, Cu, Ti, and their alloys.
Claim 18
Independent Claim
74 words
A method of manufacturing a superconducting wire comprising the steps of: filling a starting material for forming an oxide superconductor (1), in a tubular sheath member (2) to form a filled member; processing said filled member into a wire shape; and performing a heat treatment on said filled member to convert the starting material filled in said sheath member (2) into an oxide superconductor (1) which is conductive enough to effectively transmit a current.
Claim 19
Independent Claim
74 words
A method of manufacturing a superconducting wire comprising the steps of: filling a starting material for forming an oxide superconductor (1), in a tubular sheath member (2) to form a filled member; processing said filled member into a wire shape; and performing a heat treatment on said filled member to convert the starting material filled in said sheath member (2) into an oxide superconductor (1) which is conductive enough to effectively transmit a current.
Claim 20
Dependent Claim
19 words
A method according to claim 17, characterized in that said oxide superconductor (1) has a perovskite type crystal structure.
Claim 21
Dependent Claim
42 words
A method according to claim 18, characterized in that said oxide superconductor (1) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 22
Dependent Claim
48 words
A method according to claim 19, characterized in that said oxide superconductor (1) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 23
Dependent Claim
47 words
A method according to claim 19, characterized in that said oxide superconductor (1) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 24
Dependent Claim
29 words
A method according to claim 17, characterized in that said sheath member (2) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, and their alloys.
Claim 25
Dependent Claim
21 words
A method according to claim 17, characterized in that the processing step is achieved by extrusing, swaging, rolling, or wire drawing.
Claim 26
Dependent Claim
22 words
A method according to claim 17, characterized in that the heat treatment step is performed at a temperature of at least 500°C.
Claim 27
Dependent Claim
19 words
A method according to claim 17, characterized in that the heat treatment step is performed in an oxidizing atmosphere.
Claim 28
Dependent Claim
40 words
A method according to claim 25, characterized in that the heat treatment step is performed after said sheath member (2) is partially removed so that external oxygen is directly in contact with the starting material inside said sheath member (2).
Claim 29
Dependent Claim
27 words
A method according to claim 18, characterized in that the starting material filled in said sheath member (2) is a powder formed by grinding said oxide superconductor.
Claim 30
Dependent Claim
32 words
A method according to claim 18, characterized in that said oxide superconductor starting material is compression-molded, and is then inserted in said sheath member (2) in the form of a molded body.
Claim 31
Dependent Claim
22 words
A method according to claim 28, characterized in that said molded body is molded at a pressure of 1 to 5 t/cm².
Claim 32
Dependent Claim
25 words
A method according to claim 18, characterized in that a core member (6) is inserted in said oxide superconductor starting material before the processing step.
Claim 33
Dependent Claim
23 words
A method according to claim 18, characterized in that grinding is performed until the grains of the powder become substantially single crystal grains.
Claim 34
Dependent Claim
28 words
A method according to claim 31, characterized in that the ratio of a diameter to a thickness of each grain of the powder is substantially 3 to 5.
Claim 35
Dependent Claim
21 words
A method according to claim 32, characterized in that a diameter of the powder grain is substantially 1 to 5 µm.
Claim 36
Dependent Claim
29 words
A method according to claim 27, characterized in that the processing step reduces a diameter of said sheath member (2) to not more than 1/10 of an original diameter.
Claim 37
Dependent Claim
29 words
A method according to claim 34, characterized in that the processing step reduces a diameter of said sheath member (2) to not more than 1/20 of an original diameter.
Claim 38
Dependent Claim
36 words
A method according to claim 34, characterized in that by the processing step, the C planes (14) of the crystal grains (13) of said oxide superconductor (11) are oriented along the longitudinal direction of said wire.
Claim 39
Dependent Claim
23 words
A method according to claim 36, characterized in that a crystal orientation rate of the crystal grains (13) is not less than 70%.
Claim 40
Dependent Claim
19 words
A method according to claim 37, characterized in that a packing density of the powder is 50 to 90%.
Claim 41
Dependent Claim
28 words
A method according to claim 27, characterized in that by the processing step, said wire is formed into a flat shape and has a pair of flat surface.
Claim 42
Dependent Claim
38 words
A method according to claim 39, characterized in that by the processing step, the C planes (24) of the crystal grains (23) of said oxide superconductor (11) are oriented to be parallel to said flat surfaces (25, 26).
Claim 43
Dependent Claim
30 words
A method according to claim 39, characterized in that by the processing step, the filled member is formed to a flat wire while reducing a diameter of the filled member.
Claim 44
Dependent Claim
31 words
A method according to claim 39, characterized in that by the processing step, the filled member is shaped into a flat wire after a diameter of the filled member is reduced.
Claim 45
Dependent Claim
32 words
A method according to claim 39, characterized in that by the processing step, a ratio of a width to a thickness of said wire is set to be not less than 2.
Claim 46
Dependent Claim
22 words
A method according to claim 39, characterized in that a crystal orientation rate of the crystal grains is not less than 70%.
Claim 47
Dependent Claim
19 words
A method according to claim 44, characterized in that a packing density of the powder is 50 to 90%.
Claim 48
Independent Claim
81 words
A method of manufacturing a superconducting wire, comprising the steps of: filling a starting material for forming an oxide superconductor, in a metal tube to form a filled member; processing the filled member into a wire shape; removing said metal tube from said filled member; performing a heat treatment on the resultant wire to be converted into an oxide superconductor (1) which is conductive enough to effectively transmit a current therethrough; and coating said oxide superconductor with a sheath member (2).
Claim 49
Independent Claim
81 words
A method of manufacturing a superconducting wire, comprising the steps of: filling a starting material for forming an oxide superconductor, in a metal tube to form a filled member; processing the filled member into a wire shape; removing said metal tube from said filled member; performing a heat treatment on the resultant wire to be converted into an oxide superconductor (1) which is conductive enough to effectively transmit a current therethrough; and coating said oxide superconductor with a sheath member (2).
Claim 50
Dependent Claim
19 words
A method according to claim 46, characterized in that said oxide superconductor (1) has a perovskite type crystal structure.
Claim 51
Dependent Claim
42 words
A method according to claim 47, characterized in that said oxide superconductor (1) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 52
Dependent Claim
48 words
A method according to claim 48, characterized in that said oxide superconductor (1) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 53
Dependent Claim
47 words
A method according to claim 48, characterized in that said oxide superconductor (1) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 54
Dependent Claim
32 words
A method according to claim 46, characterized in that said sheath member (2) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, Cu, and Fe, and their alloys.
Claim 55
Dependent Claim
21 words
A method according to claim 46, characterized in that the processing step is achieved by extrusing, swaging, wire drawing, or rolling.
Claim 56
Dependent Claim
22 words
A method according to claim 46, characterized in that the heat treatment step is performed at a temperature of at least 500°C.
Claim 57
Dependent Claim
19 words
A method according to claim 46, characterized in that the heat treatment step is performed in an oxidizing atmosphere.
Claim 58
Dependent Claim
15 words
A superconducting wire having: an Ag matrix; and an oxide superconductor formed in said matrix.
Claim 59
Dependent Claim
15 words
A superconducting wire having: an Ag matrix; and an oxide superconductor formed in said matrix.
Claim 60
Dependent Claim
19 words
A superconducting wire according to claim 55, characterized in that said oxide superconductor has a perovskite type crystal structure.
Claim 61
Dependent Claim
42 words
A superconducting wire according to claim 56, characterized in that said oxide superconductor contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 62
Dependent Claim
48 words
A superconducting wire according to claim 57, characterized in that said oxide superconductor contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 63
Dependent Claim
47 words
A superconducting wire according to claim 57, characterized in that said oxide superconductor contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 64
Independent Claim
49 words
A method of manufacturing a superconducting wire comprising the steps of: forming an Ag alloy which contains metals for constituting an oxide superconductor in a wire; and performing a heat treatment on the Ag alloy wire in an oxidizing atmosphere to form an oxide superconductor in an Ag matrix.
Claim 65
Independent Claim
49 words
A method of manufacturing a superconducting wire comprising the steps of: forming an Ag alloy which contains metals for constituting an oxide superconductor in a wire; and performing a heat treatment on the Ag alloy wire in an oxidizing atmosphere to form an oxide superconductor in an Ag matrix.
Claim 66
Dependent Claim
23 words
A method according to claim 60, characterized in that the heat treatment step is performed within a temperature range of 400 to 940°C.
Claim 67
Dependent Claim
23 words
A method according to claim 60, characterized in that the heat treatment step is performed in an atmosphere of air or oxygen gas.
Claim 68
Dependent Claim
21 words
A method according to claim 60, characterized in that the forming step is achieved by extrusing, swaging, wire drawing, or rolling.
Claim 69
Dependent Claim
30 words
A method according to claim 60, characterized in that by the forming step, a molten Ag alloy is rapidly solidified and is directly formed into a wire or a tape.
Claim 70
Dependent Claim
18 words
A method according to claim 60, characterized in that said oxide superconductor has a perovskite type crystal structure.
Claim 71
Dependent Claim
41 words
A method according to claim 65, characterized in that said oxide superconductor contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 72
Dependent Claim
47 words
A method according to claim 66, characterized in that said oxide superconductor contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 73
Dependent Claim
46 words
A method according to claim 66, characterized in that said oxide superconductor contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 74
Dependent Claim
21 words
A superconducting wire comprising: an oxide superconductor (31, 33); and a metal core member (32, 34) buried in said oxide superconductor.
Claim 75
Dependent Claim
21 words
A superconducting wire comprising: an oxide superconductor (31, 33); and a metal core member (32, 34) buried in said oxide superconductor.
Claim 76
Dependent Claim
21 words
A superconducting wire according to claim 69, characterized in that said oxide superconductor (31, 33) has a perovskite type crystal structure.
Claim 77
Dependent Claim
44 words
A superconducting wire according to claim 70, characterized in that said oxide superconductor (31, 33) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 78
Dependent Claim
50 words
A superconducting wire according to claim 71, characterized in that said oxide superconductor (31, 33) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of Ba, Sr, and Ca).
Claim 79
Dependent Claim
49 words
A superconducting wire according to claim 71, characterized in that said oxide superconductor (31, 33) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 80
Dependent Claim
33 words
A superconducting wire according to claim 69, characterized in that said core member (32, 34) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, Cu, Ti, and their alloys.
Claim 81
Dependent Claim
18 words
A superconducting wire according to claim 74, characterized in that said core member (32) has a linear shape.
Claim 82
Dependent Claim
18 words
A superconducting wire according to claim 74, characterized in that said core member (34) has a plate-like shape.
Claim 83
Independent Claim
93 words
A method of manufacturing a superconducting wire, comprising the steps of: filling a starting material for forming an oxide superconductor, in a metal tube to form a filled member; inserting a metal core member (32, 34) in said metal tube along a longitudinal direction of said metal tube; processing said filled member into a wire shape; removing said metal tube from said filled member; and performing a heat treatment on the resultant wire to convert the wire into an oxide superconductor (31, 33) which is conductive enough to effectively transmit a current therethrough.
Claim 84
Independent Claim
93 words
A method of manufacturing a superconducting wire, comprising the steps of: filling a starting material for forming an oxide superconductor, in a metal tube to form a filled member; inserting a metal core member (32, 34) in said metal tube along a longitudinal direction of said metal tube; processing said filled member into a wire shape; removing said metal tube from said filled member; and performing a heat treatment on the resultant wire to convert the wire into an oxide superconductor (31, 33) which is conductive enough to effectively transmit a current therethrough.
Claim 85
Dependent Claim
20 words
A method according to claim 77, characterized in that said oxide superconductor (31, 33) has a perovskite type crystal structure.
Claim 86
Dependent Claim
43 words
A method according to claim 78, characterized in that said oxide superconductor (31, 33) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 87
Dependent Claim
49 words
A method according to claim 79, characterized in that said oxide superconductor (31, 33) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 88
Dependent Claim
48 words
A method according to claim 79, characterized in that said oxide superconductor (31, 33) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 89
Dependent Claim
33 words
A method according to claim 77, characterized in that said metal core member (32, 34) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, Cu, Ti, and their alloys.
Claim 90
Dependent Claim
32 words
A method according to claim 77, characterized in that said starting material of the oxide superconductor is compression-molded, and is inserted in said metal tube in the form of a molded body.
Claim 91
Dependent Claim
22 words
A method according to claim 83, characterized in that said molded body is molded at a pressure of 1 to 5 t/cm².
Claim 92
Dependent Claim
27 words
A method according to claim 83, characterized in that said core member (32, 34) is buried in said molded body upon the molding of said starting material.
Claim 93
Dependent Claim
34 words
A method according to claim 83, characterized in that a hole is formed in said molded body along a longitudinal direction of the wire, and said core member (32) is inserted in the hole.
Claim 94
Dependent Claim
18 words
A method according to claim 77, characterized in that said metal tube is removed by an etching process.
Claim 95
Dependent Claim
13 words
A superconducting coil formed by winding a superconducting wire according to claim 1.
Claim 96
Dependent Claim
20 words
A superconducting coil according to claim 88, characterized in that said oxide superconductor (1) has a perovskite type crystal structure.
Claim 97
Dependent Claim
43 words
A superconducting coil according to claim 89, characterized in that said oxide superconductor (1) contains Cu and at least one element selected from the group consisting of: Ba, Sr, Ca, Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu.
Claim 98
Dependent Claim
49 words
A superconducting coil according to claim 90, characterized in that said oxide superconductor (1) contains a composition represented by (La 1-x M x )₂CuO₄ ( x indicates atomic %, 0 ≦ x < 0.1, and M is an element selected from the group consisting of: Ba, Sr, and Ca).
Claim 99
Dependent Claim
48 words
A superconducting coil according to claim 90, characterized in that said oxide superconductor (1) contains a composition represented by ABa₂Cu₃O 7-δ (δ ≦ 0.2, and A represents an element selected from the group consisting of: Y, Yb, Ho, Dy, Eu, Sm, Gd, Nd, La, Er, Tm, and Lu).
Claim 100
Dependent Claim
33 words
A superconducting coil according to claim 88, characterized in that said sheath member (2) contains a material selected from the group consisting of: Ag, Au, Pt, Pd, Cu, and Fe, and their alloys.
Claim 101
Dependent Claim
28 words
A superconducting coil according to claim 88, characterized in that said sheath member (5) has a double-layered structure comprising an inner layer (3) and an outer layer (4).
Claim 102
Dependent Claim
40 words
A superconducting coil according to claim 94, characterized in that said outer layer (4) contains Cu or a Cu alloy, and said inner layer (3) contains a material selected from the group consisting of: Ag, Au, Pt, and their alloys.
Claim 103
Dependent Claim
31 words
A superconducting coil according to claim 89, characterized in that C planes (14) of crystal grains (13) of said oxide superconductor (11) are oriented along a longitudinal direction of said wire.
Claim 104
Dependent Claim
52 words
A superconducting coil according to claim 96, characterized in that said wire is of a flat shape and has a pair of flat surfaces (25, 26), and the C planes (24) of the crystal grains (23) of said oxide superconductor (21) are oriented to be parallel to the flat surfaces (25, 26).
Claim 105
Dependent Claim
22 words
A superconducting coil according to claim 96, characterized in that an orientation rate of the crystal grains is not less than 70%.
Claim 106
Dependent Claim
22 words
A superconducting coil according to claim 97, characterized in that an orientation rate of the crystal grains is not less than 70%.
Claim 107
Dependent Claim
26 words
A superconducting coil according to claim 97, characterized in that a ratio of a width to a thickness of said wire is not less than 2.
Claim 108
Dependent Claim
44 words
A superconducting coil according to claim 97, characterized in that said coil is formed by winding said wire so that a direction of a magnetic flux generated inside said coil is parallel to a flat surface of said wire upon energization of said coil.
Claim 109
Dependent Claim
13 words
A superconducting coil formed by winding a superconducting wire according to claim 55.
References Cited (Backward Citations)
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